Clamp-file



(No Model.)

CLAMP FILE.

A. DOM. pi

Patented Aug. 13, 1889.

UNITED STATES PATENT OFFICE;

ALEXANDER DOM, OF MOUNT HEALTHY, OHIO.

CLAMP-FILE.

SPECIFICATION forming part of Letters Patent No. 409,142, dated August13, 1889.

Application filed June 1'7, 1889.

To all whom it may concern:

Be it known that I, ALEXANDER DOM, a citizen of the United States,residing at Mount Healthy, in the county of Hamilton, State of Ohio,have invented certain new and useful Improvements in Olamp-Files,ofwhich the fo1- lowing is a specification, reference being had to theaccompanying drawings, in which- Figure 1 is a perspective View of myimproved file as viewed from the rear end thereof. Fig. 2 is a top viewof the clamp-board broken away and the spring-support connected thereto,the clamp being removed. Fig. 3 is a side view of my improved file in anoperative position.

The object of my invention is to provide a temporary file which shall becheap of manufacture and at the same time simple and effective inoperation. The file may also be advantageously used for retaining aloose package of paper in position while being written 011 in tabletform.

My improved file is preferably constructed as follows: The clampproperAis so stamped or otherwise formed as to provide the sideextensions or lugs a a and a central rearwardlyinclined bearing-lug a,all integral with the body of the clamp. The rearwardly-inclined lug ais preferably provided with two grooves a o in which the ends of thespring-support rest when in an operative position. The clamp-shaft B issuitably connected to the side lugs a a of the clamp proper.

The operating spring support is formed from one continuous piece ofspring-wire in such a manner as to form the base D, coiled bearings 61d, and extensions (1 d, as shown, the end portions of the base beingconnected to the clamp-board E in any suitable manner.

The clamp-shaft B is passed through the coiled bearings 61 d of thespring-support and the ends of said shaft are then riveted or otherwisesuitably securedto the lugs a a. The end portions of the extensions d dof this sprin -support bear against the under face of Serial No.314,615. (No model.)

the central rearward projection a in the grooves a aiwhieh has thetendency, through the resiliency of the spring, to continually force thefront portion of the clamp A down 011 the clamp-board and securelyretain any papers that may be inserted between said clamp and board.

To release or replace any paper in the file, all that is required is toput pressure on the extension a of the clamp, which will release thefront portion of the clamp from off the paper or board.

The advantages of my improved file are apparent. By reason of theafore-described construction the cost of manufacture is lessened, inthat no box, receptacle, or housing is required for the spring. Theconstruction of the spring-support is such that it acts as a support andbearing for the clamp-shaft.

\Vhat I claim as new, and desire to secure by Letters Patent, is

1. In combination with the clamp-board and clamp, the latter having theside lugs and central rearward projection integral therewith, thespring-support' connected to said clampboard and so bent as to form abase-support and journal-bearings for the clamp-shaft, the latterpassing through the coiled portions of said spring, the ends of saidspring bearing against the under face of the extension of the clamp,substantially as set forth.

2. A file consisting of a clamp-board E, clamp A, the latter having theside lugs to a, and rearward projection (1, having the grooves a atherein, in combination with the spring-support consisting of a base D,coiled bearings d d, and projections d d, the clamp-shaft 13 passingthrough the coiled portions (1 d, the ends of said shaft being connectedto the side lugs a a of the clamp, substantially as described.

ALEXANDER DOM.

WVitnesses:

Jnssn R. LAW, ED. STREHLI.

